Cooling apparatus



Jan. 12, 1937. F. SERGARDI COOLING APPARATUS Filed May 29, 193:5

2 Sheets-Sheet l llllllll l INVENT OR. F/rfi/a jiwfiw/ BYZZ If 2 Z ATTORNEY.

Jan. 12, 1937. SERGARD] 2,067,421

COOLING APPARATUS Filed May 29, 1933 2 Sheets-Sheet 2 IN VENTOR.

- ORNEY.

Patented Jan. 1 2, 1937 PATENT FFIE 2,067,421 COOLING APPARATUS Fabio Sergardi, Lansing,

Motor Car Company, igan Mich., assignor to Reo a corporation of Mich-- lic tion May 9, 1933, Serial No. 73,391 4 Claims. "(01. 123-196) This invention relate's'to apparatus for cooling fluids and more particularly to an apparatus for cooling oil or other lubricants employed in the operation of internal combustion engines.

' Heretofore, where lubricant cooling devices have been employed in connection with internal combustion engines they have usually been installed separately from the engine proper requiring extra space and also necessitating the use of a considerable quantity of tubing or other conduits, resulting in a cumbersome and costly installation.

Itis'therefore one object of the present invention to provide alubricant cooling apparatus for use with internal combustion engines which may either be built into or secured to'the cylinder block ofthe engine in' compact relation thereto. Another object of the invention is the provision of an improved fluid cooling apparatus or sys- Other objects and advantages of the inventlonwill become apparent from a reading of the following description taken in connection with theaccompanying drawings in which;

. Fig. '1 is'a side elevational view, partially in section, of an internal combustion engine, showing the cooling device of the present invention as ap plied thereto;

Fig. 2 is a broken, horizontal sectional view of {3 parts of an engine and the present cooling apparatus, the'view being taken substantially on the line 2-2 of Fig. 1; Fig. 3 is a sectional 3-3 of Fig. 2, and; Fig. 4 is a sectional diagrammatical view of the cooling tubes and associated structure taken substantially on the line 4-4 of Fig. 3.

The invention as applied to internal combustion engines of present day construction and arrangement comprises a plurality of pairs of slightly spaced telescoping tubes positioned within a casing. This casing may be positioned at least partially within the cylinder block in close proximity to the cylinders and directly in the 5 path of cooling fluid flowing from a force pump, or other source, to the passageways surrounding the cylinders, or may be secured to an outer wall {of the cylinder blocka Oil or other lubricant flowing from a sump or pump is introduced into view taken on the line 50 thespaces .provided between the two tubes of Teach. pair, and the cooling fluid is made to pass throughnthe inner. j tubes and also around the outer tubes'so that the'f hin film of lubricant ineach pair of tubes is'quickly and thoroughly 9 5 cooled from all sides thereof.

Provision is also made to allow the cooling fluid to flow from the casing, around the cylinders and to continue its circuit, and also for the lubricant to be returned to the conduits comprising the main lubricating system.

Referring now to the drawings, reference numeral I0 indicates the cylinder block of an internal combustion engine to which is secured a casing, indicated generally at H, which contains the cooling apparatus comprising the present invention. An oil filter IA of well known construction having a connecting conduit 13 to an oil pump I2 is secured in any suitable manner to the crank case l5 and is connected by a supply conduit iii to the cooling apparatus. A return conduit I1 fromthe cooling apparatus is connected to a duct l8 formed in the crank case and which carries the lubricant to the general lubricating system.

As shown in, Figs. 1 and 2 the forward end of the cylinder block is extended to provide a chamber 19 within which is mounted a force pump 2! of any suitable design for forcing cooling fluid into the cylinderblock and around the cylinders. The cooling fluid may be supplied to the pump 2| through a conduit 22 which may be connected to the radiator or other cooling apparatus of the engine, as is well known in the art. A passageway 23 is provided in the cylinder block between the pump chamber [9 and the interior thereof so that the cooling fluid may flow into the cylinder block and through the spaces or passageways 24 surrounding the cylinders 20.

In accordance with the present invention, when the cylinder block is formed, a portion of one side wall thereof is omitted providing an opening extending substantially the full length thereof. The back plate 25 of casing H is provided with flanges and may preferably be formed to fit within this opening and to extend into the interior of the cylinder block to lie in close proximity to the outer walls of the cylinders, as is clearly shown in Fig. 2. The front plate 26 of easing II is formed to extend slightly outwardly of the cylinder block and is also provided with flanges whichcoa'ct with the flanges on the back plate to form a suitable enclosure. A suflicient number of gaskets 21 are provided between the flanged portions of the two plates and the assembly is bolted as at 28 or otherwise suitably secured to the cylinder block with additional gaskets being positioned adjacent the cylinder block. An end wall of this back plate is formed with an opening 30 which registers with the passageway 23 so that the chamber so formed is in open communication with the pump chamber l9 to rea casing in registration 29 to carry the cooling between the cylinders. I

It will thus be seen that cooling fluid flowing.

I through the openings 29 and nozzles 31' into the spaces surrounding and between the cylinders.

tubes 35, somewhat smaller in diameter than the. tubes 34 ter reside in the A between each pair of tubes. These through. As shown in Figs. 2 and ceive cooling fluid flowing to the passageways surrounding the cylinders.

From the foregoing construction it will be seen that a casing is formed which is partially built into the cylinder block and forms an integral part thereof making a very compact and neat arrangement whereby space is conserved and connecting tubing is practically eliminated.

The casing is provided with suitable openings 29 at points between each pair of cylinders and extended nozzle members 3| are secured to the with some of the openings fluid well into the spa'ces from the pump mechanism 2| passes through the passageway From the cylinder passageways the cooling fluid may continue its circuit back to the cooling. ra-

diator as is "well understood.

. T'ocool the oil or other lubricant employed to lubricate the moving parts of the engine, a cluster of tubes 32 is suitably secured within the ,casing H in contact with the cooling fluid therein and extends longitudinally thereof but is slightly spaced from the-ends. Lubricant is passed through this cluster of tubes to be cooled and is then returned to the. lubricating system.

The constructional features of the tubing clus provision of a plurality of hollow tubes 34 hereinreferred to. as the .outer tubes, which connect .a pair of spaced, hollow headers 33 and are in open communication with the. interiors thereof as shown in Fig. 4. Hollow herein referred'to' as the inner tubes,

are telescopically positioned within the tubes'34, the" walls thereof being, equally spaced from the walls of the tubes 34 to form small-passageways tubes 35 extend to the exteriors of thehollow headers 33 to be in open communication with the interior of the chamber ll so that. cooling fluid may pass there- 3 the pairs of tubes arev spaced from each other providing spaces B therebetween through which the cooling fluid may circulate. within the casing ll.

V Asuitable. casting 36Qis positioned interiorly of the chamber H on the front. plate 26 approximately midway between. the ends thereof and is provided with parallelducts. 31 and 38 to which are connected the oil intake conduit l6. and the return conduit ll. respectively which in turn are other suitable means...

In the operation of the present device, the

cooling fluid. entersthe cooling chamber II from the force pump 2| and travels through the inner tubes 35 as shown. by arrows in Fig. 4', as well as around the outer tubes 34' through spaces B therebetween. and then and 3| into the The lubricant flowing, from the oil pump t2 passes through the openings 29 passages between the cylinders.

throughthe filter Wand the intake conduit I'B, passageways 31 and 40, and tube 39 into the interior of the forward; hollow header and then into the spacesA between tubes 34 and 35 tothe interior of the opposite header and back through conduit4'3; and passageways 4| and 38, to the return'lihe ll", also shown by arrows in Fig. 4.

23; into the chamber I l and then out engine having a cylinder "second tube within said from the walls thereof providing a passageway and means conveying The view of Fig. 4 is slightly exaggerated to better show the construction, but in actual practice the spaces A between the interior walls of the tubes 34 and the exterior walls of the tubes 35 are very small so that lubricant passing between the two tubes is spread into a thin film and quickly cooled inasmuch as the cooling fluid surrounds it on all sides. This space, of course, may be varied to suit existing conditions.

It will be seen that by the present invention a very compact and efiicient cooling apparatus has been provided for cooling the lubricant of an internal combustion engine. The cooling apparatus, as shown, is. built into the cylinder block making for a very compact arrangement, thus conserving space and substantially eliminating costly tubing and conduits, but could be conveniently's'ecured'to'the exterior of the cylinder blockfif desired.

While the cooling apparatus per se has been designed for and is shown in connection with an internal combustion engine, it will be apparent that it would be readily adaptable to other cooling purposes and that the construction as shown in the drawings may take other forms without departing from the spirit or scope of the invention which is to be limited only by the appended claims.

What is claimed and desired to be secured by Letters Patent is:

1. In combination with an internal combustion engine having a cylinder block, a pressure lubricating system for supplying lubricant to the engine bearings 'and a" pump for supplying cooling fluid under pressure to said cylinder block, a casing positioned partially in said cylinder block in communication with said pump and the interior of said cylinder block, a' pair of spaced hollow headers in said casing, a cluster of tubes extending between said headers and consisting of pairs of tubes arranged one within the other, each tube of each pair being spaced from the other to provide one passage between the walls thereof and another passageway within the inner tube, the outer tube of each pair terminating within each of the hollow headers in open communication with the interiors thereof, and

tubes, conduit means between the interior of said casing. and said cylinder block, and means connected to the interior of the other header for conveying the cooled lubricant to the engine bearings- 2. In combination with an internal combustion block, a pressure lubricating system for supplying lubricant to the engine bearings and a pump for supplying cooling fluid under pressure to said cylinder block, a casing positioned partially in said cylinder block in communication with said pump and the interior of said cylinder block, a pair of spaced hollow headers arranged in said casing, a tube connecting the interiors of said hollow headers, a first tube and spaced between the two tubes, said second tube extending to the exteriors of said headers; means conveying the lubricantto theinteriorOf one header and thence to the passageway between the two tubes, the cooling fluid to said secondtube'and also to theinterior ofsaid-casi-ng whereby said cooling fluid surrounds said first tube and also is carried through the second tube.

3. In combination with an internal combustion engine having a cylinder block, a pressure lubricating system for supplying lubricant to the engine bearings and a pump for supplying cooling fluid under pressure to said cylinder block, a casing partially positioned in said cylinder block, connections between said cooling fluid pump and the interior of said casing and between the interior of said casing and said cylinder block, a pair of spaced telescoping tubes within said casing, means for conveying the lubricant to the space between said tubes, and means conveying the cooling fluid to the inner tube and also to the interior of said casing whereby said cooling fluid flows past all tube surfaces with which the lubricant is in contact.

4. In combination with an internal combustion engine having a cylinder block, a pressure lubricating system for supplying lubricant to the engine bearings and a pump for supplying cooling fluid under pressure to said cylinder block, a casing partially positioned in said cylinder block, connections between said cooling fluid pump and the interior of said casing and between the interior of said casing and said cylinder block, a pair of spaced telescoping tubes within said casing, means conveying the lubricant to the space between said tubes, and means conveying the cooling fluid to the inner tube.

FABIO SERGARDI. 

